Ortho vs. Computer Displays

[T3D Larry Berlin <lberlin@xxxxxxxxx>]

Michael Gordon  writes:
>I think you can forget orthoscopic viewing on a computer, unless you have
>a headrest that places the viewer at a fixed and controllable distance
>from the monitor.  I have tried a variety of methods for computer screen
>viewing.  Cross-eyed viewing has the advantage of being less particular
>for the monitor being used, but a long period of looking at a monitor
>crosseyed leaves me unable to do anything "normal" for a while; as does
>freeviewing of parallel images.  The relaxing of my eyes is difficult to
>reverse especially as I am nearsighted; after a period of free-viewing I
>find myself unable to focus on anything closer than about six feet, even
>with my eyeglasses on!

***********  Sounds like you need to limit your periods of viewing. Do you
use both parallel and crossed frequently during your viewing? I used to have
the kind of problem you mention but I started using both methods about
equally and I no longer have the difficulty of normal viewing afterwards.

...........  snip (great discussion of screen display options!!!).............

>Back to the topic -- since a monitor is close to your eyes, the images I
>make for computer viewing are heavily masked to make the stereo window
>approximately on the same plane as the glass; especially since some
>ambient light will be illuminating the monitor creating a real plane.
>With the computer, this masking is easy, but you want images that don't
>suffer from having nearly 63 mm chopped off one edge.

I've been noticing that TV productions now are using multiple image display
formats during special shows and even movies occasionally. They place
wide-screen images in the center and sometimes fill in the blank top and
bottom areas with smaller image repeats. Other times they use two side by
side images in the center and fill the top and bottom with other content.
They aren't intending stereo so their two windows aren't matched up but the
layout would be ideal for stereo presentations. Such a practice of arranging
more than one subject on the screen would allow you a great deal of
flexibility in a slide or moving stereo presentation. You could creatively
intermix horizontal and/or vertical compositions. 

I think you should scale the images to try and get your whole intended image
on screen rather than chopping off the edges, unless there is some reason
you want to chop off an edge.

Larry Berlin


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End of TECH3D Digest 46
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